That means you live in a city not designed for everyone and every trip to be accessible by walking. Have a look at the old city of Fes, and tell me that you need a car to do those trips? Take a look at Istanbul. People have lived in large cities without a car for centuries. Supermarkets are not a prerequisite for living in a city. Similarly, children, old age, people with disabilities can be accommodated easily without cars. The social environment can make a big difference, such as family and neighbours.